<template>
  <div>总年龄和为{{sum}}</div>
</template>

<script>
export default {
  data () {
    return {
      sum: 0
    }
  },
  created () {
    const arr = [{
      name: '小明',
      age: 18
    }, {
      name: '小花',
      age: 25
    }, {
      name: '小爱',
      age: 21
    }]
    arr.forEach(obj => {
      this.sum += obj.age
    })
  }

}

</script>

<style>
</style>
